Mucho gracias! Would rounding over the leading edge of the box help with baffle rolloff. The woodworking part will be easy for me! If Santa is good to me at work, perhaps i can have a pair of Alpair 7eN's.

To implement these different shapes, does the driver circumference have to stay in proportion to the drawn sizes. That looks like a 1" hole, so for a 4" driver, the baffle would be huge. I find it interesting that the spher does not do as well as the chamfered baffle.

You had to throw in a new twist, didn't you. I will be investigating this today. On the Tysen design, do i stand to gain anything by executing a dipole, or is it bipole, with the A7. I know i get increased SPL, but is their any other benefit? What is to be gained from a larger enclosure? Sorry about all the questions. I know you guys "in the know" probably get tired of answering them. The forum is so vast it is really time consuming trying to weed though everything.